现在完成时之瞬间动词转变为持续性动词3页.doc

现在完成时之瞬间动词转变为持续性动词（1）专题讲解：在完成时中,一个瞬间性动词(一次性动作)不能与表示一段时间的状语(for, since, how long等)连用,此时须将该瞬间动词改为延续性动词或状态动词. Eg: buy ( bought ) - have / has had 买 borrow (borrowed) - have / has kept 借 die ( died ) - have / has been dead 死 leave ( left ) - have / has been away ( from ) 离开 begin ( began ) - have / has been on 开始 join ( joined) - have / has been in 参加 - have